Brick die



3 Sheets-Sheet 1 J. c. MARTIN. JR

Filed Aug. 16 1 1 May 24, 1927.

J. C. MARTlN, JR

BRICK DIE Filed Aug. x6, 1926 s shams-sheet 2 @Hoz wear May 24,1927.

May 24, 1927. 1,630,066

J. c. MARTIN, JR

BRICK DIE i Fileduz. 16, 1926 I5 Sheets-Sheet 3 Patented May 24, 1927.

\ UNITED STATES PATENT OFFICE.

BRICK nin. l

Application filed August 16, 1926. Serial No. 129,448.

The invention relates to dies for re-press ing brick andV has asan ,object the provision ot a die having means to form interlocking complemental projections and depressions upon opposite sides of. the brick..`

[A further object of the invention is to provide a die having means to heat the sam-e., f l p A'furtlier object .of the invention is -to provide a die having means to i'reethe repressed brick from the projection and depressiony forming elements. j 6

A further object of the invention is to provide a die having resilient means to free thel pressed brick from the die and means separate therefrom to limit the action of the resilient means. l

`Furtlier objects of the rinvention Vwill appear from they following description when 'read 4in"`eonnection with the accompanying drawings wherein VFigurel is a side .elevation partly in central vertical section showingt-lie upper and lower die members; j j Figures 2, 3,4, 5, and 6, are horizontal sections on the corresponding section lines ot Figure 61;"V

Figure 7 "is a vertical section on broken section line 7e-7 of Figure 1 showing the lower die member, j L Y Figure 8 is a side elevation ofa'briek to be formed 'by the illustrative form of the u invention shown in Figs. 1-7.

upon the facie of a brick.

.As shown,"the ydevice comprises an upper rThe upper .member is shown as secured to a press member 12 by means of b'olts13, 14, vand is shown ascomprising a block 15 havingja die member 16 secured thereto by cap screws 17,18.v` The member 16 is provided with 'a `faceplate' 19 secured thereto by cap screws 20,y 21, theY face plate having projection-forming depressions .22, 23, adapted to `form interlocking projections or bosses .To `freev the project ons upon the brick from thedepressions 22, 23,thereare shown plungers 2,4, e j, normally projecting into the spacev in the depressions 22, 23, and limited in their projection thereinby shoulders 2,6'formed by enlargements upon the plungfers 27, which enlargements are housed in the chamber 28 in the diemember 1G. Coil Ysprings 29 arefshown tofpress the-plungers 27 loutwardly'k andv these springs are shown as surrounding a. reduced portion 30 of each plunger 27, the ends of which reduced portions determine the amount of inward mo tionof the plunger'intothe die member. Vlienthe plungers are pressed inwardly, withthe compression of the springs 29,*to the limit of motion the faces 24, 25, will be iiusli with the bottoms of theV depressions Means for heating the die meinbei 16, and by `conduction the. face plate 19, is shown in the form of chamber 31 in the die'block having pipes 32, 33, for introduction and withdrawal of steam. As shown in Figure-1, the pipes 32, 33, enter the chamber at the `upper portion thereof anda. baille 34 extending downwardly from the i'ootl oi' the chamber to a point yabove the floor thereof is provided, to cause the steam to effectually heat 'the walls of the chamber. The lower die block 11 is adapted to be secured to a press member, not shown, by cap screws 35, 36, andcomprises the block 11 and a tace plate 37.`

To form interlocking depressions in one side'of the brick to bei formed, the lower die member 11 is shown as provided with depr-ession-foi'ming membersf38, 39, shown asapplied to the block 11 byscrewthreaded 'i projections 49 taking into correspondingly screwthreaded sockets in theblock 11'. ,The members 38, 39, are telescopically received in openings 41 in the face plate 37 and nor: mally have their fac-es 42, standing flush with the face of the plate. y

Thel face plate 37 is shown'as pressed outwardly to the limit of its travell by means of fa coiled spring 43 seated inv acavity 44 in the central portion of the dieblock 11. To 4limit Vthe outward travel 1of the face `sie plate, lthere are shown bolts 45, 46,rigidly carried by thefaceplate and slidable in openings 47, 48, Iin vthe ydie block. `Tlie amount ot motionof the face plate 3T as well as its parallelism withr the die block 11 is' adaptedto be adjusted by nuts 49. 50, and the'adjustment may be secured by lock nuts .51, 52.` y

The heads of cap screws 35,136, and the nuts 49, 52 are accessible within recesses 53, i

54,-in the ends' of thedie block `l1.` The members 38, 39, are shown las'tormed with' `tapering surfaces 55 in order to provide de pressions in the brick having a? form to readily receive the projections formed by 'the cavities ,22, 23, in the upper die. block andthe members 38,39, have enlarged portions 56 at the base of the tapered portions 55, which, when the face plate 37 is depressed to the limit of its travel, completely fill the openings 4l inthe face plate. By virtue of the single spring 43 for pressing the face plate 37 outwardly and separate' bolts 45, 4G, for limiting the travel of the face plate, the brick will be effectively freed from the surfaces of the members 38, 39.

To heat the die block 1l and the members 38, 39, there is shown an annular chamber 57 having cylindrical central portion 58 surrounding the spring receiving cavity 44. To conduct steam to the chamber 57 there are shown pipes 59, GO, having communication through passages (il, (52, with the chamber for the introduction Aand withdrawal of steam therefrom.

lVhen a brick is placed between the upper and lower dies, enclosed in a frame not shown, and one of the die member is caused to move towards the other thereof, the relatively light springs '29 will first be compressed as the brick material flows into the depressions 22, 23, with inward motion of the faces 24, 25, then the spring 43 will be compressed with projection of the members 3 3, 39, to form cavities in the lower face of the brick. VThe dies being heated and the projections 3S, 39, having considerable heat stored therein will form a slight skin upon the brick after which, the iressure being relieved, the spring 43 will nst expand causing the members 38, 39, to be withdrawn from the lower depressions, after which the plungers 27 will cause the brick to be freed from the surface of the face plate 19` when the brick may be readily removed.

' The lower die block 1l is preferably cut away as shown at 63, 64, about the members 38, 39.

The provision herein described comprising a collapsible bottom for` the projection forming depressions 22, 23,*is very important in the successful and uninterrupted operation of the device. A difficulty hereto# fore has been the freeing of the projections formed upon the brick from the depressions which form the same, with a result that the projections have broken away from the body of the brick and remained in the die, necessitating a closing down of the press to clear away the adhering material. By virtue of the collapsible bottoms 24, 25, thisbreaking away is avoided and the die being heated, a slight curing of the clay results, assisting in the freeing of the formed projections from the die. This is particularly important in the pressing of granular clay material suchas is manipulated in therepressing of refractory brick.

Moreover by virtue ofthe fact that the projections will be formed upon'the brick with-the forcing of the plungers 24, 25, by compression of the relatively light springs 29, before the stiff spring 43 is depressed, to cause the depressions in the brick to be formed, the projections will receive the greater amount of curing action and will be the more readily separated from the cavities. Since the material about the formed depression in the brickis supported about the periphery of the openings 4l, the projection forming members o5 will separate from the formed cavities without diiliculty.

At (55 in Figure l, a mold to enclose the material while being pressed by the dies, is shown in dotted lines. A side elevation of a form of brick, which may be formed by the dies chosen to illustrate the invention, is shown at (3(3 in Figure 8 of the invention.

. Minor changesmay be made in the physical embodiment of the invention within the scope of thefollowing claims without departing from the spirit thereof.

I claim:

LA brick die having a recess for the formation of a boss upon a brick, a collapsible bottoml for said recess and means to press said bottom into the recess for separation of the formed brick from the die surfaces.

2. A brick die comprising in combination, a die plate having projection forming recesses therein, a second die plate having depression forming means, a perforation in said second 'named plate telescoping said depression forming means whereby to house said means fiush with the surface of the plate and means operable by pressure upon the plate to cause protrusion of the depression forming means.

3. Abrick die comprising in combination, a plate having a projection forming cavity, means projecting through the bottom of said cavity and adapted to be forced inwardly flush with said bottom, a second plate having depression forming means telescopically received therein, means whereby the projection of said depression forming means and -the recession of said means projecting into the cavity will be caused to operate when pressure is applied to said plates, said means acting to withdraw the depression forming means prior to the return to normal of the means projecting into said cavity whereby to vfree a formed brick from the die.

4. A brick die comprising in combination, a plate having a projection forming cavity therein, a plunger pressed into said cavity through the bottom thereof by a relatively light spring, a second plate having an opening,a` depression forming means lhoused in saidcpemng, said perforated plate pressed to position flush with the end of said depression forming means by a relatively stiff spring whereby pressure upon a brick between said'plates will first cause the formation of project-ions npon the brick with recession of the plunger into the cavity and will l means to limit thev action of said resilient Cil later cause projection of saidr depression forming means with freeing of the brick from the plates ,by a reverse action.

5. A brick die comprising in combination, a plate having projection forming cavities therein, a plunger projecting through the bottom of each of said cavities and adapted to be forced into said plate to lie flush with plungers to return to normal position whereby to free formed projections from said cavities and means to heat said plate an plungers. i

6. A brick die comprising in combination, a plate having projection forming cavities therein, a second plate having perforations therein, means telescopically received in said perforations to form depressions in a brick, a block rigidly carrying said projection forming means, resilient means to press said plate away from said block and separate means.

7. A brick die comprising in combination, a plate vhaving projection forming cavities therein, la second plate having perforations center of said plate to press the plate away from the block and a plurality of means adjacent the periphery of the plate to limit `such separation. the bottom of the cavity, means to cause said v S. A brick die having a recess for the .formation of a boss upon a brick, a collapsible bottom for said recess, means to press said bottom into the recess for separation of the formed brick from the die surfaces and means to heat said die.

9. A brick die comprising in combination, a die plate having `projection forming recesses therein, a second die plate having depression forming means, a perforation in said second named plate telescoping said depression forming means whereby to house said means flush with the surface of the plate, means operable by pressure upon the plate to cause protrusion of the depression forming means and means to heat each of said die plates.

JESSE C. MARTIN, JR, 

